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High purity bisphenol A-based epoxy resin with consistent molecular weight distribution.
Excellent thermal stability and low volatility during processing.
Superior compatibility with common amine and anhydride curing agents.
Low chloride content (< 500 ppm), ensuring enhanced electrical insulation properties.
Optimized viscosity for easy handling, dispensing, and impregnation in industrial applications.
Electrical laminates and printed circuit board (PCB) prepregs.
High-voltage insulating castings and potting compounds.
Structural adhesives for aerospace and automotive composites.
Wind turbine blade matrix resins requiring dimensional stability and fatigue resistance.
Coatings for corrosion-resistant steel and aluminum substrates in marine and industrial environments.
| Chemical Type | Bisphenol A diglycidyl ether (DGEBA) |
| Product Form | Clear to pale yellow viscous liquid |
| Appearance | Homogeneous, transparent, free from gel or sediment |
| Epoxy Equivalent Weight (EEW) | 184–190 g/eq |
| Viscosity (25°C) | 12,000–16,000 mPa·s |
| Chlorine Content | ≤ 500 ppm |
| Color (Gardner) | ≤ 3 |
| Softening Point | Not applicable (liquid at room temperature) |
Q1: What is the typical application profile of Sanmu SM828U in epoxy formulations?
A: Sanmu SM828U is a standard-grade bisphenol A epoxy resin designed for general-purpose applications including protective coatings, electrical laminates, and adhesive systems. It offers balanced reactivity, good mechanical properties, and compatibility with common amine and anhydride curing agents.
Q2: How does SM828U compare to higher-molecular-weight epoxy resins in terms of viscosity and handling?
A: SM828U exhibits relatively low to moderate melt and solution viscosity compared to solid or high-epoxy-equivalent-weight resins, facilitating easier processing, mixing, and impregnation—especially in solvent-based coating and composite prepreg applications.
Q3: Is SM828U suitable for use in food-contact or potable water applications?
A: SM828U is not pre-qualified for direct food-contact or potable water applications. Its suitability depends on full formulation compliance—including curing agent selection, processing conditions, and final regulatory assessment by the end-user or authorized testing body.
Q4: What are the recommended storage conditions to maintain stability?
A: Store SM828U in tightly sealed containers at temperatures between 15°C and 25°C, away from moisture, direct sunlight, and strong oxidizing agents. Prolonged exposure to elevated temperatures or humidity may affect viscosity and shelf life.
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E-mail: wangxingqiang@ericwchem.com
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